Furnace.



L. L: KNOX & M. MURRAY. FURNACE.

APPLICATION FILED JULY 8, 1908.

919,188: Patented Apr. 20, 1909.

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manual I A APPLICATION TILED EXT 9, 1908. v 8 Patented Apr. 20, 1909. y2 snnsm-annm a, r i? 25 ticularly NI ED srarnerarnn'r oFFroE.

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Toall whom it may concern:

' .iBe it known that we, LUTHER L. KNox, of Ben Avon, Allegheny county,Pennsylvania, and MONTGOMERY NiURRAY, of Wilkinsburg,

-5 Allegheny county, Pennsylvania, have inr 1" vented,a new. and usefulImprovement in Furnaces, of which the following is a full, 'clear,iandexact description, reference being hadto theacoom part of thisspecincation, in which j; F-igure' l is an end-view of one form offurnace embodying our invention Fig. 2 is a horizontal section of thesame taken on the line-I III of Fig. 3 Fig. 8 is a vertical sectiontaken on the line III'III of Fig. 1'; and

11-:3 Fig. 4 is a detail view of one of the cooling boxes iiOurinvention has relation to regenerative reversingfurnaces, and moreparticularly to openhearthfurnaces, and is designed to pro- "61videqmeans" of an' improved and effective character for protecting thegas and air ports of the furnace from the destructive action of the heatand hot gases, and relates more fairto a novel arrangement of coolingplates or boxes in the walls of the as and air ports, and to theconstruction 0 the arch which separates the gas and air. ports and tothe manner of cooling the same.

. .'The present ap lication is a division of our application Seiia No.416,185, filed February-17th,'1908. g The precise nature of ourinvention will be best understood by reference to the accompanyindrawings, in'which we have shown W one em odlment thereof, and whichwill now be described, it being premised, however, that various changesmay be made therein by those skilled in the art without departing 40from the spirit andscope of our invention,

as defined in the appended claims.

In these drawings, the numeralZ designates the Walls of an open hearthfurnace,

which is in general of ordinary construction.

3 designates a portion of the furnace hearth,4 designates the gasup-takes, and 5 the air rip-takes.

' In the furnace shown, there are two gas up-takes and three airup-takes, but my invention is not limited to any particular number ofthese tip-takes, since a single gas uptake and a single air 11 -take maybe employed or any other esired number, ac-

Specification' of Letters I-a t ent. Qriginal application filed February17, 1908, Serial No. 416,185. s, Serial No. 442,455.

anying drawings, forming pUrHER L. ,KNox, or BEN AVON, A D MONTGOMERYMURRAY, or wrtxmsenaa. PENN- "SYLVA'NIA, ASSIGNORS TO KEYSTONE FURNACE-O0NSTRUOTION QJWMPANYHOF rrrrssuse, PENNSYLVANIA, A CORPORATION 0FURNACE.

"recent-ad April 20, 1909. Divided and this applica t ion flled'IuIy aeoel cording to the size and character of the furnace-Q These up-takesare separated from each other by the intermediate wallslor piers 6. Thegas up-talies communicate with the furnace chamber at their up )er endsby means of the gas ports 7, anclthe air up,- takes communicate withsaid chamber by means of the air ports 8.: a 9 designates the arch overthe gas ports. This arch is', of refractoryinaterial, and is built as anintegral art ofthe walls of the 7 ports, and is cooled y means of thehollow co'oling plates or boxes 10 and 10 embedded therein. These boxesare inserted into the. arch into chambers therein provided there.- forwithin the refractory materialof the arch through openings 11 in'thesidewall'of the furnace in the manner shown in Fig. 2, their inner ,endsbeing preferably separated from 'each'other by an intervening wall 12.The

boxes 10 are provided with the circulating connections 13 and 14, andwiththeinterior bafiies 15, which provide for. roper ciroula tion of thewater therein. he boxes 10..-

are provided with the valve circulating bonnections 16, and are dividedinto a plurality of separate compartments as shown in .Fig. 2, eachcompartment having its own-circulating' connections. In this manner,should the compartment nearest to. the nose of the arch become burnedout, the water'may be shut out of that com artment, and soon until thearch is burne back to the last compartment of the boxes 10. W e alsopreferably place in each of the intervening walls or piers, between thegas and air ports a co'oing box or plate 17, which is inserted into an oening into a chamber to receive the same romthe end of the furnace.These cooling boxes 17 (one of which is'shown'in detail in Fig. 4)extend inwardly to the point where the gas ports discharge into the fur-9b nace, and effectively rotect theside walls of these ports. l/Ve a sopreferably provide the bridge or arch 19, which constitutes the lowerwall of the gas ports, with cooling boxes 20, 21, and 22, which areinserted therein from the sides of the furnace in a manner similar tothe boxes 9 and 10. The front walls of the gas and air up-takes are alsopreferably provided with a plurality of water-cooling boxes 24, set intothe brick work thereof, these-boxes being arranged in series one aboveanother between adjacent piers, 1n the manner shown in Fig. 1. Eachvertical series of these boxes is connected'by a pi e 25 with a supplypipe 26. The several oxes are connected in series, the up 'er separatingthe gas and air ports, together with the walls of the ports which aremost subject to the destructive action, are effectively protected. Thecooling plates and boxes are readily accessible, and canbe replaced andrenewed when burned out. Our invention, therefore, greatly prolongs thelife of the ports as a whole, and limits the renewals and repairs to theportions thereof which can be readily removed and replaced.

It will be obvious that our invention is not limited to the particulararrangement of cooling plates and boxes which we have herein shown anddescribed, since these may be arranged in various ways. The circulatingconnections may also be changed, as may be most convenient in anyparticular case, and the construction and arrangement of the baffles inthe interiors of thecooling boxes may also be varied. It will also be'for shutting off the water-supply from one or inore of thecompartments; substantially as described.

2. In a furnace of the type described having gas and air ports, an archseparating said ports, hollow water-cooled boxes or castings removablyseated within the said arch, and other water-cooled boxes seated inother Walls of the ports; substantially as described.

3. In a furnace of the type described having gas and air ports, an archseparating said ports, hollow water-cooled boxes or castings removablyseated in said arch, and removable through 0 enings at op osite sides ofthe furnace; su stantially as escribed.

4. In a furnace'of the character described having a gas port leadinginto the furnace, removable water-cooled boxes within the lower, innerand outer walls of said ports; substantially as described.

5. In a furnace of the character described I having a gas port leadinginto the furnace,

removable water-cooled boxes within the 7. A furnace of the classdescribed having a plurality of gas and air up-takes, a plurality ofwater-cooled boxes in the end wall of each up-take, and otherwater-cooling boxes in the walls or piers separating the severalLip-takes; substantially as described.

as and air up-takes separate 8. In a furnace of the class describedhaving gas and air ports, an arch of refractory material separating thegas and air orts and integrally connected with the wa s of the furnace,and water-oooling boxes removably inclosed within said arch, said boxesbeing removable at the-side of the furnace; sub stantially as described.

9. In a furnace of the class described having gas and air ports, an archof refractory material separating the gas and air orts and integrallyconnected with the we s of the furnace, and water-cooling boxesremovably inclosed within said arch, said boxes being removable at theside of the furnace and having a plurality of separate compartments andwater circulating connections therefor provided with means for shuttinoif the water supply from one or more of the compartments; substantiallyas described.

In testimony whereof, we have hereunto set our hands.

LUTHER LQKNOX. MONTGOMERY MURRAY.

Witnesses:

GEO. H. PARMELEE, H. M. Conwnv.

